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1-3
u
MICROPHONE CONNECTOR [MIC]
Accepts an optional microphone.
• See page 15-4 for appropriate microphones.
• See page 2-10 for microphone connector information.
i
MIC GAIN CONTROL [MIC]
(p. 3-12)
Adjusts microphone input gain.
• The transmit audio tone in the SSB, AM and FM modes
can be adjusted independently in set mode. (p. 12-5)
✔
How to set the microphone gain.
Set the [MIC] control so that the ALC meter occasionally
moves up-scale during normal voice transmission, in the
SSB, AM or FM mode.
o
VOX SWITCH
VOX
➥
Push to turn the VOX function ON or OFF dur
-
ing SSB, AM and FM mode operation. (p. 6-2)
➥
Hold down for 1 second to enter VOX set mode.
(p. 6-2)
✔
What is the VOX function?
The VOX function (voice operated transmission) acti
-
vates transmission without pushing the transmit switch
or PTT switch when you speak into the microphone; then
automatically returns to receive when you stop speaking.
!0
RF POWER CONTROL [RF PWR]
(p. 3-12)
Continuously varies the RF output power from a
minimum of 5 W* to a maximum
of 200 W*
.
*AM mode: 5 W to 50 W
!1
BREAK-IN SWITCH
BK-IN
Push to turn the break-in function ON
(semi-break-
in, full-break-in)
or OFF during CW mode operation.
(p. 6-3)
✔
What is the break-in function?
The break-in function switches transmit and receive with
CW keying. Full break-in (QSK) can monitor the receive
signal between CW dots and dashes.
!2
ELECTRONIC CW KEYER SPEED CONTROL
[KEY SPEED]
(p. 4-4)
Adjusts keying speed for the internal electronic CW
keyer.
• 6 wpm (minimum) to 48 wpm (maximum) is the adjust
-
able range.
!3
MONITOR SWITCH
MONITOR
(p. 6-4)
Monitors your transmitted IF signal.
• The CW sidetone functions regardless of
MONITOR
switch setting in the CW mode.
• The [MONITOR] indicator above this switch lights
green while the function is activated.
!4
BREAK-IN DELAY CONTROL [DELAY]
(p. 6-3)
Adjusts the transmit-to-receive switching delay
time for CW semi-break-in operations.
!5
AGC CONTROL [AGC]
(p. 5-12)
Adjusts the continuously-variable AGC circuit time
constant.
• To use [AGC] control, push
AGC VR
([AGC VR] indi
-
cator lights).
!6
SQUELCH CONTROL [SQL]
(outer control; p. 3-9)
Adjusts the squelch threshold level. The squelch
mutes noise output from the speaker (closed con-
dition) when no signal is received.
• The squelch is particularly effective for FM. It is also
available in other modes.
• The 11 to 12 o’clock position is recommended for the
most effective use of the [SQL] control.
Deep
Deep
Noise squelch
Squelch
threshold
Shallow
Shallow
S-meter
squelch
Squelch is
open
Slow
Fast
Long delay for
slow speed keying
Short delay for
high speed keying
Max.
48 wpm
Min.
6 wpm
Increases
Decreases
Recommended level for
an Icom microphone
Decreases
Decreases
Increases
Increases
1
PANEL DESCRIPTION